The initial recall was put into place last month, after salmonella was found in batches of the company’s dry dog food, according to the FDA.

No illnesses have been reported in dogs, but so far 16 cases of salmonella in humans have been found in nine states and Canada, according to the Centers for Disease Control and Prevention (CDC). Affected humans may have caught salmonella from handling the dry dog food and then handling their own food, or from cross contamination with utensils. The CDC is still investigating the outbreak.